Carbon stock of Moso bamboo (Phyllostachys pubescens) forests along a latitude gradient in the subtropical region of China

Abstract

Latitude is an important factor that influences the carbon stock of Moso bamboo (Phyllostachys pubescens) forests. Accurate estimation of the carbon stock of Moso bamboo forest can contribute to sufficient evaluation of forests in carbon sequestration worldwide. Nevertheless, the effect of latitude on the carbon stock of Moso bamboo remains unclear. In this study, a field survey with 36 plots of Moso bamboo forests along a latitude gradient was conducted to investigate carbon stock. Results showed that the diameter at breast height (DBH) of Moso bamboo culms increased from 8.37 cm to 10.12 cm that well fitted by Weibull model, whereas the bamboo culm density decreased from 4722 culm ha−1 to 3400 culm ha−1 with increasing latitude. The bamboo biomass carbon decreased from 60.58 Mg C ha−1 to 48.31 Mg C ha−1 from north to south. The total carbon stock of Moso bamboo forests, which comprises soil and biomass carbon, ranged from 87.83 Mg C ha−1 to 119.5 Mg C ha−1 and linearly increased with latitude. As a fast-growing plant, Moso bamboo could be harvested amounts of 6.0 Mg C ha−1 to 7.6 Mg C ha−1 annually, which indicates a high potential of this species for carbon sequestration. Parameters obtained in this study can be used to accurately estimate the carbon stock of Moso bamboo forest to establish models of the global carbon balance.

Regular Fertilization Effects on the Nutrient Distribution of Bamboo Components in a Moso Bamboo (Phyllostachys pubescens (Mazel) Ohwi) Stand in South Korea

“…Nutrient stocks of the aboveground biomass in unfertilized plots in this study were 344 kg ha −1 for N, 31 kg ha −1 for P, and 362 kg ha −1 for K. The values were slightly higher than in Moso bamboo forests (N: 274 kg ha −1 , P: 17 kg ha −1 , K: 289 kg ha −1 ) in China [19]. In addition, the C stocks of 48,900 kg ha −1 in this study were within the range (48,310 kg ha −1 -60,580 kg ha −1 ) observed in Moso bamboo stands of the subtropical region in China [20]. Nutrient stocks in roots were significantly higher in the unfertilized plots than those in the fertilized plots, except for the P stocks of roots, whereas the nutrient stocks in rhizomes were not affected by regular fertilization (Table 4).…”

“…DBH growth in fertilized plots could be affected by the increased number of new shoots following fertilizer application [19]. The values of DBH in this study were slightly higher than the range (mean: 8.37-10.12 cm) of Moso bamboo stands (culm density: 3400-4732 culm ha −1 ) in the subtropical region of China [20]. Table 1.…”

Spatial pattern and driving factors of biomass carbon density for natural and planted coniferous forests in mountainous terrain, eastern Loess Plateau of China

“…We began with the construction of a priori model for the multi-group SEM procedure. The priori model was constructed to include all hypothesized causal relationships between BCD and potential driving factors based on the known effects of driving factors and the relationships among driving factors of forest growth and biomass accumulation (Bollen 1989;Shipley 2004;Xu et al 2018aXu et al , 2018b. As shown in Annex 2a of Additional file 1, five driving factors were included in the priori model: stand age, stand coverage, mean annual precipitation, latitude, and elevation.…”

“…In addition, as another important geographical factor, latitude may have indirect effect on forest biomass carbon density by affecting plant growth and productivity through temperature and precipitation effects. It was found that the forest biomass carbon density decreased with increasing latitude along the north-south transect of eastern China (Wen and He 2016); while the biomass carbon density of Moso bamboo forests linearly increased with latitude (Xu et al 2018a(Xu et al , 2018b.…”

“…The average above-ground biomass carbon density of mature forests increased with stand age for the forests younger than 450 years (Liu et al 2014); while the biomass carbon density of ponderosa pine forest increases rapidly until 150-200 years (Law et al 2003). The SEM indicated that canopy coverage and stand age were the most important driving factors of biomass carbon density in subtropical forests (Xu et al 2018a(Xu et al , 2018b. Moreover, the effect of elevation on forest carbon density has attracted great attention, especially in mountainous areas.…”